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    —— 7-(3-Chlorophenyl)-1,3-dimethyl-5-(2-oxopropylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione —— C17H15ClN4O3S
    7-(3-Chlorophenyl)-1,3-dimethyl-5-(2-oxopropylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(4-Ethoxyphenyl)-5-(2-methoxyethylsulfanyl)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione —— C19H22N4O4S
    7-(4-Ethoxyphenyl)-5-(2-methoxyethylsulfanyl)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(4-Chlorophenyl)-1,3-dimethyl-5-propan-2-ylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C17H17ClN4O2S
    7-(4-Chlorophenyl)-1,3-dimethyl-5-propan-2-ylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(4-Ethoxyphenyl)-1,3-dimethyl-5-propan-2-ylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C19H22N4O3S
    7-(4-Ethoxyphenyl)-1,3-dimethyl-5-propan-2-ylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(3-Chlorophenyl)-5-(2-ethoxyethylsulfanyl)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione —— C18H19ClN4O3S
    7-(3-Chlorophenyl)-5-(2-ethoxyethylsulfanyl)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(4-Chlorophenyl)-5-ethylsulfanyl-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione —— C16H15ClN4O2S
    7-(4-Chlorophenyl)-5-ethylsulfanyl-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(3-Methoxyphenyl)-1,3-dimethyl-5-propylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C18H20N4O3S
    7-(3-Methoxyphenyl)-1,3-dimethyl-5-propylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(2-Chlorophenyl)-1,3-dimethyl-5-propylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C17H17ClN4O2S
    7-(2-Chlorophenyl)-1,3-dimethyl-5-propylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-[[4-(Difluoromethoxy)-3-methoxyphenyl]methoxy]chromen-2-one —— C18H14F2O5
    7-[[4-(Difluoromethoxy)-3-methoxyphenyl]methoxy]chromen-2-one
    —— 7-[2-(5-Methylthiophen-2-yl)-2-oxoethoxy]chromen-2-one —— C16H12O4S
    7-[2-(5-Methylthiophen-2-yl)-2-oxoethoxy]chromen-2-one
    —— 7-(4-Bromophenyl)-1,3-dimethyl-5-methylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C15H13BrN4O2S
    7-(4-Bromophenyl)-1,3-dimethyl-5-methylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(4-Chlorophenyl)-1,3-dimethyl-5-(3-methylbutylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione —— C19H21ClN4O2S
    7-(4-Chlorophenyl)-1,3-dimethyl-5-(3-methylbutylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-[(5-Phenyl-1,3-oxazol-2-yl)methoxy]chromen-2-one —— C19H13NO4
    7-[(5-Phenyl-1,3-oxazol-2-yl)methoxy]chromen-2-one
    —— 7-(4-Ethoxyphenyl)-1,3-dimethyl-5-prop-2-enylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C19H20N4O3S
    7-(4-Ethoxyphenyl)-1,3-dimethyl-5-prop-2-enylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-cyclohexyl-1,3-dimethyl-5-((2-(piperidin-1-yl)ethyl)thio)pyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione —— C21H31N5O2S
    7-cyclohexyl-1,3-dimethyl-5-((2-(piperidin-1-yl)ethyl)thio)pyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione
    —— 7-butyl-1,3-dimethyl-5-[(E)-3-phenylprop-2-enyl]sulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C21H24N4O2S
    7-butyl-1,3-dimethyl-5-[(E)-3-phenylprop-2-enyl]sulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Butyl-1,3-dimethyl-5-[(3-nitrophenyl)methylsulfanyl]pyrimido[4,5-d]pyrimidine-2,4-dione —— C19H21N5O4S
    7-Butyl-1,3-dimethyl-5-[(3-nitrophenyl)methylsulfanyl]pyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(Methoxymethyl)-1,3-dimethyl-5-[(2-methylphenyl)methylsulfanyl]pyrimido[4,5-d]pyrimidine-2,4-dione —— C18H20N4O3S
    7-(Methoxymethyl)-1,3-dimethyl-5-[(2-methylphenyl)methylsulfanyl]pyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-cyclopentyl-5-(ethylthio)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione —— C15H20N4O2S
    7-cyclopentyl-5-(ethylthio)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione
    —— 7-(3-Chlorophenyl)-5-ethylsulfanyl-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione —— C16H15ClN4O2S
    7-(3-Chlorophenyl)-5-ethylsulfanyl-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(4-Chlorophenyl)-5-cyclopentylsulfanyl-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione —— C19H19ClN4O2S
    7-(4-Chlorophenyl)-5-cyclopentylsulfanyl-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-butyl-1,3-dimethyl-5-[(1R)-1-phenylethyl]sulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C20H24N4O2S
    7-butyl-1,3-dimethyl-5-[(1R)-1-phenylethyl]sulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Butyl-1,3-dimethyl-5-prop-2-enylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C15H20N4O2S
    7-Butyl-1,3-dimethyl-5-prop-2-enylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Butyl-1,3-dimethyl-5-(naphthalen-1-ylmethylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione —— C23H24N4O2S
    7-Butyl-1,3-dimethyl-5-(naphthalen-1-ylmethylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Butyl-1,3-dimethyl-5-propylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C15H22N4O2S
    7-Butyl-1,3-dimethyl-5-propylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Butyl-1,3-dimethyl-5-(2-piperidin-1-ium-1-ylethylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione —— C19H30N5O2S+
    7-Butyl-1,3-dimethyl-5-(2-piperidin-1-ium-1-ylethylsulfanyl)pyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-(Methoxymethyl)-1,3-dimethyl-5-[(4-methylphenyl)methylsulfanyl]pyrimido[4,5-d]pyrimidine-2,4-dione —— C18H20N4O3S
    7-(Methoxymethyl)-1,3-dimethyl-5-[(4-methylphenyl)methylsulfanyl]pyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Cyclohexyl-5-(2-methoxyethylsulfanyl)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione —— C17H24N4O3S
    7-Cyclohexyl-5-(2-methoxyethylsulfanyl)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Butyl-1,3-dimethyl-5-phenacylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione —— C20H22N4O3S
    7-Butyl-1,3-dimethyl-5-phenacylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-Butyl-5-[2-(diethylamino)ethylsulfanyl]-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione —— C18H29N5O2S
    7-Butyl-5-[2-(diethylamino)ethylsulfanyl]-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione
    —— 7-cyclopentyl-5-((3-fluorobenzyl)thio)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione —— C20H21FN4O2S
    7-cyclopentyl-5-((3-fluorobenzyl)thio)-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione
    —— 7-Methyl-6-propan-2-yl-4-[(4-pyrimidin-2-ylpiperazin-1-ium-1-yl)methyl]chromen-2-one —— C22H27N4O2+
    7-Methyl-6-propan-2-yl-4-[(4-pyrimidin-2-ylpiperazin-1-ium-1-yl)methyl]chromen-2-one
    —— 7-Hydroxy-8-methyl-4-[(4-pyrimidin-2-ylpiperazin-1-ium-1-yl)methyl]chromen-2-one —— C19H21N4O3+
    7-Hydroxy-8-methyl-4-[(4-pyrimidin-2-ylpiperazin-1-ium-1-yl)methyl]chromen-2-one
    —— 7-Hydroxy-8-methyl-4-[(4-pyrimidin-2-ylpiperazin-1-yl)methyl]chromen-2-one —— C19H20N4O3
    7-Hydroxy-8-methyl-4-[(4-pyrimidin-2-ylpiperazin-1-yl)methyl]chromen-2-one
    —— (7-Hydroxy-2-oxochromen-4-yl)methyl-dimethylazanium —— C12H14NO3+
    (7-Hydroxy-2-oxochromen-4-yl)methyl-dimethylazanium
    —— 7-methyl-2-[[(3S)-3-methylpiperidin-1-ium-1-yl]methyl]pyrido[1,2-a]pyrimidin-4-one —— C16H22N3O+
    7-methyl-2-[[(3S)-3-methylpiperidin-1-ium-1-yl]methyl]pyrido[1,2-a]pyrimidin-4-one
    —— 7-hydroxy-8-methyl-4-[[(3R)-3-methylpiperidin-1-ium-1-yl]methyl]chromen-2-one —— C17H22NO3+
    7-hydroxy-8-methyl-4-[[(3R)-3-methylpiperidin-1-ium-1-yl]methyl]chromen-2-one
    —— (7R)-3-[[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C21H20N4O3S
    (7R)-3-[[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7R)-3-[[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C20H17ClN4O2S
    (7R)-3-[[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7S)-3-[[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C20H17ClN4O2S
    (7S)-3-[[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7R)-7-methyl-3-[[3-(2-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C21H20N4O2S
    (7R)-7-methyl-3-[[3-(2-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7R)-7-methyl-3-[2-oxo-2-(2-oxo-3,4-dihydro-1H-quinolin-6-yl)ethyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C22H21N3O3S
    (7R)-7-methyl-3-[2-oxo-2-(2-oxo-3,4-dihydro-1H-quinolin-6-yl)ethyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7S)-3-[(4,5-dimethoxy-2-methylphenyl)methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C21H24N2O3S
    (7S)-3-[(4,5-dimethoxy-2-methylphenyl)methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7S)-3-[2-(2,5-dimethyl-1-propan-2-ylpyrrol-3-yl)-2-oxoethyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C22H27N3O2S
    (7S)-3-[2-(2,5-dimethyl-1-propan-2-ylpyrrol-3-yl)-2-oxoethyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7-ethyl-2-oxochromen-4-yl)methyl (2S)-3-phenyl-2-(tetrazol-1-yl)propanoate —— C22H20N4O4
    (7-ethyl-2-oxochromen-4-yl)methyl (2S)-3-phenyl-2-(tetrazol-1-yl)propanoate
    —— (7S)-3-[2-(1-ethyl-2,5-dimethylpyrrol-3-yl)-2-oxoethyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C21H25N3O2S
    (7S)-3-[2-(1-ethyl-2,5-dimethylpyrrol-3-yl)-2-oxoethyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7R)-7-methyl-3-[(4-methylsulfanylphenyl)methyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C19H20N2OS2
    (7R)-7-methyl-3-[(4-methylsulfanylphenyl)methyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7S)-3-[2-(2,5-dimethoxyphenyl)-2-oxoethyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C21H22N2O4S
    (7S)-3-[2-(2,5-dimethoxyphenyl)-2-oxoethyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7S)-3-[(2-ethoxyphenyl)methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C20H22N2O2S
    (7S)-3-[(2-ethoxyphenyl)methyl]-7-methyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one
    —— (7R)-7-methyl-3-[(5-phenyl-1,3-oxazol-2-yl)methyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one —— C21H19N3O2S
    (7R)-7-methyl-3-[(5-phenyl-1,3-oxazol-2-yl)methyl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one